Well, at least it would give the monarchy something useful to do. It's not as if the Commonwealth has King Ludwig II on the throne (who to give him credit managed to ruin his country's finances without any constitutional power at all). More to the point, asking the Queen to withdraw her assent is legal. I'm more concerned that her doing so would precipitate a law removing that power, because it's inevitable that one day there will be a law that really needs vetoing, given how little the general populace seems to learn from history,

And after Her Majesty does so, perhaps she'd like to intervene in the circus that is Australian politics too? We've had one PM dismissed by the Queen's representative in a century, can we have another one and then the resignation of the Opposition Leader? Yeah, I wish.